Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2101
MPLX
MPLX
$59.5B
| $1.7M | ﹤0.01% |
56,726
+9,878
| +21% | +$311K |
|
2102
Nice
NICE
$5.29B
| $1.7M | ﹤0.01% |
9,024
+6,416
| +246% | +$1.34M |
|
2103
Axsome Therapeutics
AXSM
$12.4B
| $1.7M | ﹤0.01% |
38,051
+11,711
| +44% | +$585K |
|
2104
CALL
Tanger
SKT
$4.82B
| $1.69M | ﹤0.01% |
123,800
-25,800
| -17% | -$401K |
|
2105
CALL
Hewlett Packard
HPE
$63.2B
| $1.69M | ﹤0.01% |
141,300
-223,200
| -61% | -$3.03M |
|
2106
PUT
Bentley Systems
BSY
$9.54B
| $1.69M | ﹤0.01% |
55,300
+51,500
| +1,355% | +$1.88M |
|
2107
CALL
SandRidge Energy
SD
$510M
| $1.69M | ﹤0.01% |
103,700
+66,500
| +179% | +$1.2M |
|
2108
CALL
Madrigal Pharmaceuticals
MDGL
$12.6B
| $1.69M | ﹤0.01% |
26,000
+21,300
| +453% | +$1.48M |
|
2109
PUT
AbCellera Biologics
ABCL
$1.62B
| $1.69M | ﹤0.01% |
170,500
-20,700
| -11% | -$227K |
|
|
ITCI
2110
PUT
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $1.68M | ﹤0.01% |
36,200
+30,800
| +570% | +$1.61M |
|
2111
PUT
Milestone Pharmaceuticals
MIST
$144M
| $1.68M | ﹤0.01% |
+183,200
| New | +$1.39M |
|
2112
CALL
SM Energy
SM
$7.96B
| $1.68M | ﹤0.01% |
44,700
+15,200
| +52% | +$598K |
|
2113
CALL
Globalstar
GSAT
$10.2B
| $1.68M | ﹤0.01% |
70,427
+35,074
| +99% | +$846K |
|
2114
PUT
Middleby
MIDD
$6.05B
| $1.68M | ﹤0.01% |
13,100
-17,400
| -57% | -$2.44M |
|
2115
CALL
Melco Resorts & Entertainment
MLCO
$2.1B
| $1.68M | ﹤0.01% |
253,200
-63,000
| -20% | -$347K |
|
|
DVAX
2116
CALL
DELISTED
Dynavax Technologies
DVAX
| $1.68M | ﹤0.01% |
160,600
-65,800
| -29% | -$857K |
|
|
FLG
2117
CALL
Flagstar Bank National Association
FLG
$5.77B
| $1.68M | ﹤0.01% |
65,500
+28,900
| +79% | +$849K |
|
|
DM
2118
CALL
DELISTED
Desktop Metal, Inc.
DM
| $1.67M | ﹤0.01% |
64,400
+660
| +1% | +$18.5K |
|
2119
Peloton Interactive
PTON
$2.63B
| $1.67M | ﹤0.01% |
240,367
+85,206
| +55% | +$866K |
|
2120
Casella Waste Systems
CWST
$5.69B
| $1.66M | ﹤0.01% |
+21,793
| New | +$1.75M |
|
2121
Invesco DB Commodity Index Tracking Fund
DBC
$1.73B
| $1.66M | ﹤0.01% |
69,582
+55,251
| +386% | +$1.4M |
|
2122
CALL
B&G Foods
BGS
$285M
| $1.66M | ﹤0.01% |
100,800
+26,500
| +36% | +$589K |
|
2123
CALL
SIGA Technologies
SIGA
$223M
| $1.66M | ﹤0.01% |
161,300
-76,100
| -32% | -$1.22M |
|
|
NSTG
2124
DELISTED
NanoString Technologies, Inc.
NSTG
| $1.66M | ﹤0.01% |
130,086
+44,292
| +52% | +$615K |
|
2125
CALL
Kinsale Capital Group
KNSL
$7.95B
| $1.66M | ﹤0.01% |
6,500
+700
| +12% | +$174K |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.